1  /*
       2   * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
       3   *
       4   * Inspired by libvolume_id by
       5   *     Kay Sievers <kay.sievers@vrfy.org>
       6   *
       7   * This file may be redistributed under the terms of the
       8   * GNU Lesser General Public License.
       9   */
      10  #include <stdio.h>
      11  #include <stdlib.h>
      12  #include <unistd.h>
      13  #include <string.h>
      14  #include <stdint.h>
      15  
      16  #include "superblocks.h"
      17  
      18  struct hpt45x_metadata {
      19  	uint32_t	magic;
      20  };
      21  
      22  #define HPT45X_MAGIC_OK			0x5a7816f3
      23  #define HPT45X_MAGIC_BAD		0x5a7816fd
      24  
      25  static int probe_highpoint45x(blkid_probe pr,
      26  		const struct blkid_idmag *mag __attribute__((__unused__)))
      27  {
      28  	struct hpt45x_metadata *hpt;
      29  	uint64_t off;
      30  	uint32_t magic;
      31  
      32  	if (pr->size < 0x10000)
      33  		return 1;
      34  	if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
      35  		return 1;
      36  
      37  	off = ((pr->size / 0x200) - 11) * 0x200;
      38  	hpt = (struct hpt45x_metadata *)
      39  			blkid_probe_get_buffer(pr,
      40  					off,
      41  					sizeof(struct hpt45x_metadata));
      42  	if (!hpt)
      43  		return errno ? -errno : 1;
      44  	magic = le32_to_cpu(hpt->magic);
      45  	if (magic != HPT45X_MAGIC_OK && magic != HPT45X_MAGIC_BAD)
      46  		return 1;
      47  	if (blkid_probe_set_magic(pr, off, sizeof(hpt->magic),
      48  				(unsigned char *) &hpt->magic))
      49  		return 1;
      50  	return 0;
      51  }
      52  
      53  static int probe_highpoint37x(blkid_probe pr,
      54  		const struct blkid_idmag *mag __attribute__((__unused__)))
      55  {
      56  	if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
      57  		return 1;
      58  	return 0;
      59  }
      60  
      61  
      62  const struct blkid_idinfo highpoint45x_idinfo = {
      63  	.name		= "hpt45x_raid_member",
      64  	.usage		= BLKID_USAGE_RAID,
      65  	.probefunc	= probe_highpoint45x,
      66  	.magics		= BLKID_NONE_MAGIC
      67  };
      68  
      69  const struct blkid_idinfo highpoint37x_idinfo = {
      70  	.name		= "hpt37x_raid_member",
      71  	.usage		= BLKID_USAGE_RAID,
      72  	.probefunc	= probe_highpoint37x,
      73  	.magics		= {
      74  		/*
      75  		 * Superblock offset:                     4608 bytes  (9 sectors)
      76  		 * Magic string offset within superblock:   32 bytes
      77  		 *
      78  		 * kboff = (4608 + 32) / 1024
      79  		 * sboff = (4608 + 32) % kboff
      80  		 */
      81  		{ .magic = "\xf0\x16\x78\x5a", .len = 4, .kboff = 4, .sboff = 544 },
      82  		{ .magic = "\xfd\x16\x78\x5a", .len = 4, .kboff = 4, .sboff = 544 },
      83  		{ NULL }
      84  	}
      85  };
      86  
      87